CalcEarthing Calculator
Last updated: 2026-08-24
Earthing Calculator — Earthing rod sizing based on soil resistivity and rod length.
Inputs
Result
Enter values and press Calculate
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How to use it
- Calculate resistance of a pica: (100 × 0.366) ÷ 2 = 18.3 Ω
- Verify: 18.3 Ω > 10 Ω (no cumple with a pica)
- Calculate picas necesarias: 18.3 Ω ÷ 10 Ω = 1.83 → 2 picas
- Con 2 picas in paralelo: 18.3 Ω ÷ 2 = 9.15 Ω ✓ (cumple)
Common mistakes
- ⚠️ Not Measure resistividad real of the floor antes of design
- ⚠️ Enterrar picas in floor seco (best in zone húmeda)
- ⚠️ Not conectar todas The masas to the same system of tierra
Worked example
Calculate earthing resistance for a 2m rod in 100 ohm/m soil.
Con resistividad {resistividad_ohm_m} Ω·m and pica {tipo_pica} estima resistance of {strength_ohm} Ω. ¿Cumple? {cumple}. Number of picas necesarias: {picas_ud}.
Input guide
| Field | Typical range |
|---|---|
| resistividad_ohm_m | Suelo húmedo: 50-200 Ω·m, Seco: 200-500 Ω·m, Rocoso: >500 Ω·m |
| resistencia_max_ohm | Vivienda: <10 Ω, Industrial: <5 Ω, Hospitalaria: <1 Ω |